Hendrikus Albertus Lorentz

For the Dutch physicist, see Hendrik Antoon Lorentz.
Hendrikus Albertus Lorentz (left) and Lieven Ferdinand de Beaufort, 1903 Wichmann New Guinea expedition
Lorentz (top left) during the 1903 Wichmann New Guinea expedition
Lorentz (left) with a porter crossing the river Ingsim, 1903 Wichmann New Guinea expedition
Hendrikus Albertus Lorentz (left) with Jan Willem van Nouhuys (1869-1963) on a honorary medal, 1948

Hendrikus Albertus Lorentz (18 September 1871 – 2 September 1944) was a Dutch explorer in New Guinea and diplomat in South Africa.

He was born to Theodorus Apolonius Ninus Lorentz, a tobacco grower in East Java who had returned to the Netherlands and Marie Soet in 1871. Lorentz studied law and biology at Utrecht University and married Marie Louise Clemence baroness Van Zuylen van Nievelt.

Lorentz participated in three expeditions to Dutch New Guinea, the present-day Indonesian (western) portion of the island of New Guinea. The first was the North New Guinea Expedition in 1903, led by Arthur Wichmann. Lorentz himself led expeditions in 1907 and 1909–1910.